Vertibird

This refers to the undamaged variant, for the crashed/destroyed variant, see Crashed Vertibird.

The Vertibird is what appears to be a VTOL aircraft structure that resembles the V-22 Osprey. It contains two loot chests.

Location

It generates only in the desert, oftentimes, partially or (almost) completely buried in the sand.

Not very dangerous at all.

Within are two chests, one inside the main fuselage, and one hidden in the roof. They both contain:

Vertibird Loot
Item	Quantity
T-51b Power Armor Helmet	1
T-51b Power Armor Chestplate	1
T-51b Power Armor Leggings	1
T-51b Power Armor Boots	1
Fusion Core	1
Break-Action Revolver	1
Gun Oil	1
.357 Magnum Round (Full Metal Jacket)	1-24
40mm Grenade High-Explosive	1-6
26mm Signal Flare (Weapon Airdrop)	1
Uranium-235 Rod	1
Uranium Fuel Billet	1
Ingot of Uranium Fuel	1
Bottle of Nuka Cola	1-3
Bottle of Nuka Cola Quantum	1
Stealth Device	1
M65-Z Gas Mask	1
Gas Mask Filter	1
Grenade	1-2
Airstrike Designator	1

Considering it is undamaged, it presumably landed somewhere and was abandoned by its crew for whatever reason.
The Vertibird structure is a reference to the Vertibirds from Fallout - a video game franchise.